- 摘 要
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(1 天津市地下鐵道集團有限公司， 天津 300051； 2 中交第一航務工程局有限公司， 天津 300461)
［摘要］以天津地鐵下穿建筑物注漿抬升工程為研究對象，結合實測數(shù)據(jù)，采用有限元軟件ABAQUS分析軟土中注漿對建筑物的抬升效果。選取合理的注漿有限元參數(shù)，基于實測驗證的有限元模型，分析了不同土層中注漿和注漿位置上下相鄰土層彈性模量對注漿效果的影響。分析結果表明，本工程中70%的注漿量發(fā)揮了作用，最佳注漿位置為基礎底面下約6-5m處；注漿時提高注漿位置下部土層彈性模量對自重荷載較大的建筑物的抬升效果較明顯。
［關鍵詞］注漿； 抬升； 軟土； 有限元分析
中圖分類號：TU317-9文獻標識碼：A文章編號：1002-848X(2019)10-0030-07
Field monitoring and finite element analysis on buildings lifting by grouting in soft ground
Xu Zemin1， Zhao Guangmin2
(1 Tianjin Metro Group Co., Ltd., Tianjin 300051, China； 2 CCCC First Harbor Engineering Company Ltd., Tianjin 300461, China)
Abstract:Taking the grouting lifting project of underground buildings in Tianjin Metro as the research object, combined with the measured data, the finite element software ABAQUS was used to analyze the lifting effect of buildings by grouting in soft soil. The influence of grouting in different soil layers and elastic modulus of the soil layers adjacent to grouting position on grouting effect was analyzed by selecting reasonable grouting finite element parameters and based on the finite element model verified by field measurement. The results show that 70% of the grouting volume plays a role in the project, and the optimum grouting position is about 6-5 meters below the bottom of the foundation. When grouting, the effect of increasing the elastic modulus of the lower soil layer at the grouting position on the lifting of buildings with larger self-weight load is obvious.
Keywords:grouting; lift; soft soil; finite element analysis
作者簡介：徐澤民，博士，高級工程師，Email: 68084394@qq.com。
